Vaporizer and superheater



1932- E. w. BEARDSLEY 1,842,320

VAPORIZER AND SUPERHEATER Filed Nov. 12, 1929 IN 519' OR ATTORNL'Y s/ey : use of high pressure.

Patented Jan. 19, 1932 UNITED STATES PATENT OFFICE EDWIN W. BEARIDSLEY, OF TEXAS CI ITY, TEXAS, ASSIGNOR TO PETROLEUM CONVERSION CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE VAPORIZER AN'D SUPERHEATER Application filed November 12, 1929. Serial No. 406,608.

' ess of the type in which the oil is first vaporized and the produced vapor mingled either in a superheated or saturated condition with a heat carrier gas containing suflieient heat units to accomplish the cracking of such vapor. I

The invention accordingly seeks to provide an improved apparatus for vaporizing the oil and for superheating the same without the The invention also contemplates an improved arrangement by -means of which the oil vapor may or may not be superheated as desired, and in case it is not desired, providing for utilizing the superheating coil in series with the vaporizer coil whereby the heating surface maybe correspondingly increased.

Further objects of the invention and advantages to be obtained therefrom will be evident from therfollowing detailed-description taken with the annexed drawing which shows, with parts in vertical section, a front elevational view of a preferred embodiment. Referring to the drawing by characters of reference, denotes'the arch of a furnace havin contained therein a burner 11, a baflic 12 and a semi-spherical-shaped roof 15. Disposed in said furnace at one side of the bafllc 12 is a vaporizer coil 17 and a superheater coil -19, said vaporizer coil communicating with a flash drum 21 by means of pipes 23 and 25, respectively; Pipe 25 has in circuit therewith a pump 27 preferably of the rotary type. Communicating with pipe 25 is also an inlet pipe '29 for oil to be evaporated. Also in pipe 25 are valves 31 and 33 at either side of pump 27..

Drum 21 is joined by a valved nipple 36 to an ofl'take, to which the exit end of coil 19 communicates by means of pipe 37. The inlet end of coil 19 communicates with drum 21 by means of a pipe 39 below nipple 36.

Pipes 37 and 39 communicate with pipe 23 by means of cross pipes 43 and 45 respectively.

The various pipes are provided with valves as follows: Pipe 23 with a valve a between cross pipes 43 and 45; pipe 37 with a valve 6 between pipes 36 and 43; pipe 39 with a valve 0 between pipes 45 and 36; cross pipe 43 with a valve (1; cross pipe 45 with a valve 6 and nipple 36 with a valve f. Desirably an inlet 46 to drum 21 is provided for the admission thereinto of neutral gas or steam to further aid the evaporation in said drum.

The device may be operated either with the coil 19 as a superheater coil or as part of the vaporizer coil 17 as follows:

I. As a supe'rheater coil Oil entering the system through pipe 29 traverses coil 17 and thence passes through pipe 23 into drum 21, valve 0 being open and valves d and 6 being closed. In this drum a portion of the oil flashes into vapor which passes past baflies 47 into pipe 39, valve 0 being open. The vapor thus traverses the coil 19, is there superheated and is then admitted to the ofl'take 35 through pipe'37, valve 6 being open and valve 7" being closed. The superheated vapor passes through ofltake 35 to a separator 49 ofknown type and thence to a reaction chamber 51 wherein it is mingled with a hot carrier gas admitted through pipe 53, This carrier gas is of such a temperature and quantity as to accomplish the conversion of the oil vapor and the mixture leaves the reaction chamber through an ofltake 55. A pipe 50 leads any 4 liquid oil separated out in separator 49 to a suitable place of disposal. g

Liquid oil in the flash drum 21 is preferably continuously recirculated through pipe 25,

. 21 is relatively little and does not have to be withdrawn continuously. It will be understood that the pressure in coil 17 will be considerably higher than in the drum 21-, as for example, when the pressure of the system is -50 lbs. per square inch, that in the coil may run as high as 200 lbs. or more. It is, therefore, necessary to design pump 27 to take care of this increase in pressure.

[1. Operation with 001119 as a vaporize r.

In this, case the oil after traversing the coil 17 passes through cross pipe into coil 19, valve e being open and valves a and 0 being closed. From coil 19 the heated oil passes down through cross pipe 43, valve 6 being closed and valve d open, into pipe 23 and thence into flash drum 21. The vapor produced in said drumis thence passed through nipple 36, valve f being open.

The temperatures involved will vary considerably depending chiefly upon the nature of charging of stock. However, as aguide to those practicing the invention I may mention that the temperature of the oil fed to the heater through pipe 29 may run around 650 F., while after it has passed through coil 17 its temperature wi]1 be in the neighborhood of 750 F. The vapor from drum 21 after being superheated in coil 19 may have a temperature of 900 F. When the coil 19 is used as a vaporizing coil the temperature of the oil may be 800 F. In the cases mentioned, the temperature of the interior of the furnace arch 15 is to be taken as 1800 F.

It will be understood that although the oil tively of said drum, a su erheater coil in said furnace, intake and oflt e connections therefor, means joining said vaporspace and said superheater coil intake whereby the oil vapor from said drum may be superheated, and means for optionally joining said superheating and said heating coils in series and said superheating coil ofltake with said flash drum whereby said superheater coil becomes an extension of said heating coil.

3. The apparatus in accordance with claim 1 in which means are provided for circulating the liquid oil in the flash drum through the heating coil.

In testimony whereof I have aflixed my signature to this specification.

' EDWIN W. BEARDSLEY.

vapor is heated to a temperature within the cracking range in the coils 17 and 19 and particularly the latter, not enough time is allowed the oil to crack within such coils 11 and 19. Claims to the process of cracking involving the apparatus here shown are made in the co-pending application of Beardsley and Colony, filed November 12, 1929, Serial No. 406,610.

In the drawing, I have shown a superheater coil 19 in the same furnace as the vaporizer coil, a construction which has the advantage of economy in cost and in space. However,

it is within the purview of my invention to provide a superheater coil having heating means separate from that of the vaporizer coil. By the word coil in the claims I mean to include other heating surfaces such as a straight tube or a bank of tubes as are customarily used in the art.

What Iclaim is:

1: In combination, a flash drum, an Ofitake therefor, an oil heating coil, connections joining the ends of said coil with the liquid and vapor spaces respectively of said drum,

9. superheater coil, intake and oiftake connections therefor, said oil heating coil and said oil superheating coil having means for heating same, means joining said vapor space, and said su erheater coil intake whereby the oil vapor rom said drum may be superheated,

v and means for optionally joining said super- 

